A set of neutron cross sections for Ti, K, Mg, and N were prepared for neutrons energies from 0.0253 ev to 18 Mev. A revision of some of the neutron cross sections for Al, Si, Na, and O given in NDA 2111-3, Vol. C, Nov. 1, 1959 and NDA 2133-4, Jan. 31, 1961 was made based on experimental results which appeared in the literature since the publication of these reports. In addition, some typographical errors in the tabulation (n, n) cross sections for Mn in NDA 2133-4 are corrected. The results of Hauser-Feshbach calculations of reactions of O-16 are reported. (Author).